Coordinate input instrument



FIG. 1 is a top-front-right perspective view of a coordinate input instrument according to my new design;

FIG. 2 is a bottom-rear-left perspective view thereof;

FIG. 3 is a right side elevational view thereof, wherein the left side elevational view is a mirror image thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a partial top-front-right perspective view as indicated in FIG. 1 ; and,

FIG. 9 is a partial top plan view thereof as indicated in FIG. 6 .

The broken lines in the figures depict portions of the coordinate input instrument that form no part of the claimed design. 

CLAIM The ornamental design for a coordinate input instrument, as shown and described. 